Fig. 2: Hydrographic properties by distance from A-68A.
From: Giant iceberg meltwater increases upper-ocean stratification and vertical mixing
a,b, The glider realizations of conservative temperature (a) and absolute salinity (b) approaching A-68A from left to right, along with the GEM historical hydrography (black) with bootstrapped 95% confidence intervals (shaded grey) matched by dynamic height. Overlain are the individual glider profiles, coloured according to classification with blue (far), magenta (near) and red (adjacent)), with a running mean (dotted cyan) overlain. The mean glider–iceberg separation for each dynamic height group and classification is shown between a and b. The horizontal green line shows the mean iceberg draft. The data are staggered by an incremental offset for illustration. c, Buoyancy frequency (N2) calculated from the running mean of each glider classification, with appreciable maximal stratification accentuated with horizontal lines (top and bottom are identical). d, The Ri estimated using ship-borne CTD and LADCP (the locations of which are illustrated in Fig. 1), with the vertical dashed green line showing the 0.25 threshold for criticality (top and bottom are identical). The grey shading in c and d is the quantified extent of upwelled basal meltwater (see Basal meltwater contribution).
